Introduction to 21CN Resilience

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Introduction to 21CN Resilience
Tim Hubbard Head of 21CN Solutions Strategy
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Proposed topics for discussion

• Introducing the new architecture for PSTN
• 21CN Resilience and security

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21CN Three key objectives

• Empower the end user with control, choice and
  flexibility like never before including
  communications from anywhere to any device
• Offer exciting new servicesfor end user faster
  than before
• Reduce costs and grow cash cost savings -
  expected to amount to 1 billion per annum by
  2008/9

End user experience empowerment
Speed to market
Cost transformation
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21CN - evolution
A single network thats physically simpler and
more reliable than our existing, complex
infrastructure could ever be Up to 50 per cent
fewer components in terms of switches, hubs,
routers and suchlike. We will be able to deliver
the next generation of converged services faster,
more efficiently and more cost-effectively than
ever before.
21CN
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Traditional PSTN architecture

• Dedicated hierarchical network of concentrators,
  local, trunk and tandem exchanges, with fixed
  relationship between all
• Dedicated network of trunks and circuits for
  voice traffic, each call has its own circuit
• Call control traffic and voice traffic directly
  connected together
• Call control and routing carried out by all
  switches in the network

Complex Inflexible Restrictive
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21CN PSTN Separating speech and control
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control- 21CN
to 21CN call
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control- 21CN
to 21CN call
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control- 21CN
to 21CN call
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control- 21CN
to 21CN call
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control- 21CN
to OCP/PSTN
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control- 21CN
to OCP/PSTN
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN PSTN Separating speech and control- 21CN
to OCP/PSTN
Metro/Core
21CN
MSAN
PSTN OCP
MSAN
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21CN Resilience
Service
Ethernet
MPLS
SDH/WDM
D-WDM
MSAN
Metro
Core

• Physical Building, ducts, equipment, fibre, etc

• Logical Optical and packet protocols

De-couple each layer Recover at the lowest
level possible Maintain service availability
across 21CN
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21CN Resilient PSTN

• Voice
• Controlled by call server in Metro/Core Nodes
• Each MSAN has at least two routes to its primary
  call server
• Each MSAN will have a primary and secondary call
  server

Core Node
Core Node
Metro Node
Tier 1 MSAN
FMSAN
CMSAN
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21CN Resilient PSTN

• Voice
• Controlled by call server in Metro/Core Nodes
• Each MSAN has at least two routes to its primary
  call server
• Each MSAN will have a primary and secondary call
  server

Core Node
Core Node
Metro Node
Tier 1 MSAN
FMSAN
CMSAN
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21CN Resilient PSTN

• Voice
• Controlled by call server in Metro/Core Nodes
• Each MSAN has at least two routes to its primary
  call server
• Each MSAN will have a primary and secondary call
  server

Core Node
Core Node
Metro Node
X
Tier 1 MSAN
FMSAN
CMSAN
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21CN Resilient PSTN

• Voice
• Controlled by call server in Metro/Core Nodes
• Each MSAN has at least two routes to its primary
  call server
• Each MSAN will have a primary and secondary call
  server

Core Node
X
Core Node
Metro Node
Tier 1 MSAN
FMSAN
CMSAN
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21CN Reliability, continuity and resilience

• 21CN is a private IP network, NOT the Internet
• 21CN separates network and services for increased
  resilience and faster service delivery
• 21CN is engineered with high availability and
  resilience
• 21CN Assurance agreed with Central Sponsor for
  Information Assurance

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Webcall update

• 18 April Product retirements
• 24 April 21CN overview
• 2 May Migration process
• 22 May CPE compatibility testing programme
• 31 May Switched-on communications campaign
• 20 June Pathfinder programme overview
• 9 July Preparing for 21CN migration
• 26 July Broadband migration programme
• 2 August 21CN resilience and security
• 27 Sept tbc Migration portal overview
• Industry invited to suggest topics of interest
  further webcalls will be scheduled
• for the rest of 2007

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Sources of further information

• Information and support for communication
  providers on the 21CN programme
• http//www.btwholesale.com/consult21
• The independent public information website
  covering the process of migration
• http//www.switchedonuk.org
• For general information about BTs 21CN programme
  go to
• http//www.btplc.com/21CN/

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Questions
?
Answers